Automatic lock for barn-doors.



E. HEINEMANN.

AUTOMATIC LOOK FOR BARN DOORS.

APPLICATION FILED NOV. 6. 19I6.

- Patented Jan. 29, 1918.

awue/Moz ERNEST I-IEINEMANN, OF ALMA, WISCONSIN.

AUTOMATIC LOCK FOR BARN-DOORS.

Specification of Letters Patent.

Patented J an. 29, 1918.

Application filed NovemberG, 1916. Serial No. 129,825.

for Barn-Doors, of which the following is a specification, reference being had to the accompanying drawings. y

This invention relates to locks andlatches and the general object of the invention is to provide a lock particularly adapted to barn doors and the doors of outhouses, which is so constructed that it will prevent live stock from opening the doors of the barn or out house.

; vide a lock or latch of this character ineluding an operating spindle which is longitudinally shiftablc as well as rotatable, which spindle coacts with a detent when the lock bolt is thrown preventing a retraction of the bolt, the spindle being shiftable, however, longitudinally to disengage it vfron'rthe detent so that the bolt may be retractedr Still another object of the invention is to provide a latch or bolt of this character in which the bolt is held in a retracted position by resilient means which will prevent the bolt from being projected accidentally as by live stock but which will permit by a slight effort the detachment of the operating mechanism from the spring actuated means to thus permit the bolt to be thrown.

A further object is to provide a lock or latch'of this character which is very simple in construction, may be easily applied and which is thoroughly effective in operation.

Other objects will apear in the course of the following description.

Myinvention is illustrated panying drawings, wherein Figure 1 is a face view of my latching device, the spindle being in section;

in the accom- Flg. 2 is a sectional view through a door.

with the locking device applied thereto, the arm 25 and link 26 being partly broken away;

Fig. 3 is an end view of the plate 10 with the rod 11; and

Fig. 4: is an end View of the rod 15 detached from the plate 10.

Referring to these drawings, 10 designates the face plate which may be fastened in any suitable manner to a door or like closure,

the face plate being formed with a plurality of transverse ribs 1]. formed with guide pas-,

sages 12 for the passage of a longitudinally shiftable bolt 13. Fastening screws 1i may pass through certain of these ribs to hold the plate to the door. One of these ribs designated 15 is relatively wide and has a relatively long passage 16 for the bolt 13. Passing through the door and, through the plate 10, as illustrated in Fig. 2 is a handle spindle or operating spindle 17 This spindle at one end is formed with the integral handle 18 and at its. other end is screw threaded for engagement with, the nuts 19 and 20 and passes through an aperture in a handle 21, the nuts 19 and 20 holding the handle firmly in place so that when the handle is turned the spindle will be turned. The spindle is longitudinally shiftable through an opening 22 formed in the plate 10 and passing through the thickened portion 15, and between the plate 10 and a collar 23 there is disposed a coiled compression spring 2a which urges the spindle in the direction of the arrow, Fig. 2. The spindle 17 at its end adjacent the handle 18 is formed with the radially projecting arm 25 to which is pivotally connected a link 26, this link being slightly curved at its end. toward the arm 25, and extending longitudinally across the face of the plate 10 and being pivotally connected at its end to, an

upwardly turned portion 27 of .the bolt 13. It will be seen that a rotation of the spindle 17 in a clockwise direction in Fig. 1 will cause the projection of the bolt and that the rotation of the spindle in a counterclockwise direction will cause the retraction of the bolt.

The portion 15 of the plate 10 is formed with the outwardly projecting detent hi 28 which is disposed in the path of. movement of the arm v25 when the spring 24- urges said arm inward but by drawing the spindle 17 outward the arm 25 will escape the de tent lug 28 and the spindle may be rotated to retract the bolt. The bolt 13 is prov jected by means of the spring 81 which engages against a pin or other abutment 30 mounted upon the bolt, the other end of the spring bearing against the rod 11.

bolt will movement in the same direction of the spindle shifting the bolt slightly forward and the arm 25 into such position that the arm is in the dotted line position in Fig. 1 and abutted against the inclined face of the thickened portion of the plate 10 and the rib 15,'which thickened portion forms a stop limiting any further movement of the arm 25 in a counterclockwise direction and any further projection of the bolt. Under these circumstances a rotation of the spindle in a clockwise direction must first carry the bolt 13 and link 26 rearward and this is resisted by the spring 31. lhe spindle may however be manually rotated against the force of the spring 31 to shift the bolt rearward to its extreme rear position and then forward to carry the arm 25 into the full line position in Fig. 1, thus projecting the bolt. hen it has reached the full line position, the arm 25 will be just beyond the lug 28, which lug has an angularly disposed or in clined face and the spring 2% will draw the spindle inward so as to carry the arm 25 into the plane of the lug :28. Under these circumstances the bolt is projected and cannot be retracted until the spindle has been shifted against the force of the spring 2% to carry the arm :25 out of the plane of the detent lug 28.

A latch of this character it will be seen cannot accidentally be operated by animals because it involves two movements to retract the bolt, not only a movement or rotation, but a longitudinal movement of the spindle against the force of the spring 24. lVhen the bolt is retracted it cannot be accidentally projected because the movement to project the bolt must be against the force of the spring 31.

Having described my invention, what I clalm is:

1. In a latch of the character described, a bolt, a spring urging the bolt in one direction to a projected position, an actuating member having limited movement in the arc of a circle and operatively connected to the bolt to shift it in either direction, a movement of said member inone direction shifting the bolt rearward against the actlon of the spring and then forward with the expausion of the spring upon a further movethe bolt, the actuating member being shiftable in the opposite direction to that first named to shift the bolt rearward against the force of the spring and then permit the spring to fully project the bolt upon a fur-- ther movement of the actuating member in' the same direction.

2. In a latch of the character described,

a longitudinally movable bolt, a spindle mounted for rotation and for longitudinal movement at right angles to the plane of the bolt, said spindle having a radially ex tending arm, a link connecting the bolt to tl arm, a spring urging the spindle longitudinally in one direction, and a detent fixed with relation to the spindle with which the arm is adapted to engage when the bolt has been shifted to a projected position and urged in one direction by said spring.

3. In a latch of the character described, a supporting base, a bolt longitudinally movable upon the supporting base, a spindle extending through the supporting base and mounted ther .in for rotation and longitudinal movement, a spring surrounding the spindle and urging the spindle longitudinally in one direction, an arm extending from the spindle, a link connecting the arm to the bolt, a detent lug projecting from the base and disposed in the path of movement of the arm when the spindle is retracted by the spring to thereby hold the spindle in a position to project the bolt, and spring actuated means which when the spindle has turned to retract the bolt resists an initial movement of the spindle to project the bolt.

4:. In a latch of the character described, a supporting base having bolt guides, a bolt movable through the guides, a spindle mounted in the base for rotation and for longitudinal movement, said spindle having a radially extending arm, a link connecting the bolt and the arm, a spring surrounding the spindle and urging it longitudinally in one direction to carry the arm toward the base, a lug projecting from the base and with which the arm is engageable when the spindle is retracted by the spring, and a spring surrounding the bolt, and urging it to projected position.

5. In a latch of the character described, a bolt, a spring urging the bolt in one direction to a projected position, a spindle disposed at right angles to the bolt and operatively connected to the bolt to shift it in either direction, a rotation of the spindle in one direction shifting the bolt rearward against the action of the spring and then forward with the expansion of the spring upon a further rotation of the spindle in the same direction, and a stop limiting the forward movement of the bolt when the spindle is rotated in the said direction to thereby prevent the complete projection of the bolt, the spindle being rotatable in the opposite direction to shift the bolt rearward against the force of the spring and then permit the spring to fully project the bolt.

6. In a latch of the character described, a bolt, a spring urging the bolt in one direction to a projected position, a spindle disposed at right angles to the bolt and operatively connected to the bolt to shift it in either direction, a rotation of the spindle in one direction shifting the bolt rearward against the action of the spring and then forward With the action of the spring upon a further rotation of the spindle in the same direction, a stop limiting the forward move ment of the bolt when the spindle is rotated in the said direction to thereby prevent the complete projection of the bolt, the spindle being rotatable in the opposite direction to shift the bolt rearward against the force of the spring and then permit the spring to fully projectthe bolt, said spindle being longitudinally movable, a spring urging the spindle longitudinally in one direction, and means on the spindle engaging therewith when the bolt is projected preventing the rotation of the spindle in a direction to retract the bolt until the spindle Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. 7

is shifted longitudinally against the force of the said coacting spring.

7.- In a latch of the character described, a bolt support, a bolt slidably mounted therein, a rotatable actuating spindle mounted in the bolt support and having a radially projecting arm, a link operatively connected to the arm and to the extremity of the bolt, a spring urging the bolt to. a projected position, and means coacting With the spring to yieldingly hinder a rotation of the handle when the bolt is in its operative or inoperative position.

In testimony whereof I hereunto aflix my signature in the presence of two Witnesses.

ERNEST HEINEMANN.

Vitnesses EMIL BUEHLER, Tr-mononn BUEHLER.

Washington, D. 0." 

